Dirt Bike Rear Sprockets
Dirt Bike Rear Sprockets for Honda, KTM, Beta & Husqvarna: 42-51 Tooth Steel & Aluminum at JJ Motorsports
Customize your dirt bike's gearing for optimal acceleration or top speed with premium rear sprockets from JJ Motorsports, precision-machined for perfect chain fit, reduced weight, and extreme durability in motocross, enduro, and trail riding. Our selection includes high-tensile steel and lightweight aluminum sprockets in 42-51 tooth counts designed for smoother power transfer, less rotational mass, and customizable ratios to match terrain or riding style. Compatible with top models like Honda CRF, KTM SX/EXC, Beta RR, Husqvarna FC/FE, and more, these race-proven sprockets from trusted brands ensure minimal chain wear, reliable performance, and longevity in muddy, rocky, or high-speed conditions. From JT Sprockets' computer-optimized steel for OEM reliability to Renthal's ultralight aluminum for racing gains, dial in your final drive for tighter woods, faster tracks, or balanced trails with the ideal tooth count.
Shop brands like JT Sprockets, Moose Racing, and Renthal for world-class quality. Explore related categories such as dirt bike front sprockets for full gearing kits or dirt bike drive chains for complete drivetrain upgrades.
Top Dirt Bike Rear Sprockets
- JT Sprockets Steel Rear Sprocket Graphite 48 Tooth JTX251.48GR – 48-tooth hardened steel rear sprocket with graphite finish; computer-designed for perfect chain alignment and durability in off-road conditions.
- JT Sprockets Rear Sprocket Beta/Honda Red 51 Tooth JTA210.51RED – Lightweight aluminum 51-tooth sprocket in red anodized finish for Beta RR and Honda CRF models; reduces unsprung weight for better acceleration.
- Moose Offroad Steel Rear Sprocket 48 Tooth 1210-BET-48-STL – Heavy-duty steel 48-tooth sprocket for Beta models; heat-treated for extreme strength and wear resistance in aggressive off-road use.
- Renthal Rear Sprocket Aluminum 42 Tooth Gas Gas/Husaberg/Husqvarna/KTM 224U-520-42GPSI – Ultralight CNC-machined aluminum 42-tooth sprocket with gold finish; precision engineering for KTM, Husqvarna, and Gas Gas models, ideal for racing.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
Renthal 53-Tooth Rear Sprocket for Honda 154U-520-53GRBK
RENTHAL
$99.82If you're running a 520 chain on your Honda, a lightweight rear sprocket is one of the quickest ways to improve acceleration and reduce rotational mass without breaking the bank. The Renthal 53-tooth sprocket cuts approximately 66% of the weight compared...12110179- SKU:
- 12110179
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 53
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
$99.82 -
Renthal 53-Tooth Rear Sprocket for Honda Red 154U-520-53GRRD
RENTHAL
$104.61If you're running a 53-tooth setup, you know every gram of unsprung weight matters for acceleration and chassis response. The Renthal aluminum rear sprocket delivers that advantage while maintaining the durability required for serious riding—whether...12110180- SKU:
- 12110180
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- TOOTH COUNT:
- 53
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 520
- COLOR/FINISH:
- RED
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$104.61 -
Renthal 47-Tooth Black Rear Sprocket for Kawasaki 121U-428-47GPBK
RENTHAL
$99.82If you're running a Kawasaki off-road machine, sprocket selection directly impacts acceleration, chain wear, and overall drivetrain reliability. The Renthal 47-tooth rear sprocket cuts unsprung weight by two-thirds compared to steel alternatives,...12110281- SKU:
- 12110281
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
$99.82 -
Renthal Black 48-Tooth Rear Sprocket for 428 Chain 121U-428-48GPBK
RENTHAL
$99.82If you're running a 428 chain on your Kawasaki, upgrading to a lightweight aluminum sprocket directly improves throttle response and reduces unsprung weight at the rear wheel—translating to faster acceleration and better handling. The Renthal 48-tooth in...12110282- SKU:
- 12110282
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
$99.82 -
Renthal 47-Tooth Blue Rear Sprocket for Yamaha YZ85 121U-428-47GPBU
RENTHAL
$104.61If you're running a YZ85 in competitive or recreational dirt bike racing, sprocket weight directly impacts your power-to-weight ratio and throttle response. The Renthal 47-Tooth Rear Sprocket shaves off unnecessary mass while maintaining the durability...12110285- SKU:
- 12110285
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 47
$104.61 -
Renthal 48T Blue Rear Sprocket for Yamaha YZ85 1993-2026 121U-428-48GPBU
RENTHAL
$104.61If you're running a YZ85, sprocket wear directly impacts acceleration, chain life, and overall drivetrain efficiency. The Renthal 48T Blue Rear Sprocket delivers the lightweight performance advantage you need—a 7075-T6 aluminum construction that cuts...12110286- SKU:
- 12110286
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 48
- CHAIN SIZE:
- 428
- COLOR/FINISH:
- BLUE
- UNITS:
- EACH
$104.61 -
Renthal 49T Blue Rear Sprocket 428 Chain 121U-428-49GPBU
RENTHAL
$104.61If you're running a 428 chain on your dirt bike or ATV, sprocket wear directly impacts throttle response and overall drivetrain efficiency. The Renthal 49T Blue Rear Sprocket cuts weight by 66% compared to steel alternatives, translating to quicker...12110287- SKU:
- 12110287
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- MOUNTING POSITION:
- REAR
$104.61 -
Renthal 50-Tooth Aluminum Rear Sprocket for Yamaha 121U-428-50GPBU
RENTHAL
$104.61A lighter rear sprocket directly translates to reduced unsprung weight, sharper acceleration, and improved handling—critical advantages whether you're racing or pushing hard on technical terrain. The Renthal 50-tooth aluminum sprocket replaces wear-prone...12110288- SKU:
- 12110288
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MOUNTING POSITION:
- REAR
- MATERIAL:
- 7075-T6 ALUMINUM
- CHAIN SIZE:
- 428
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
$104.61 -
Renthal Red 49-Tooth Rear Sprocket for Honda CR80R CR85R CRF150R 189U-420-49GRRD
RENTHAL
$104.61Shave unsprung weight from your Honda while maintaining the durability needed for competitive riding. The Renthal 49-tooth rear sprocket cuts 66% of the mass compared to steel, directly improving acceleration and handling response without sacrificing...12110289- SKU:
- 12110289
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- RED
- MOUNTING POSITION:
- REAR
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
- TYPE:
- DRIVE
$104.61 -
Renthal 50-Tooth Rear Sprocket Red 420 Chain Honda CRF CR 189U-420-50GRRD
RENTHAL
$104.61Shaving nearly two-thirds of the weight off your rear sprocket directly translates to faster acceleration and reduced rotational inertia—critical advantages in competitive motocross and off-road riding. The Renthal 50-Tooth Rear Sprocket combines...12110290- SKU:
- 12110290
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- RED
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
$104.61 -
Renthal Red 55T Rear Sprocket for Honda CR80R CR85R CRF150R 189U-420-55GRRD
RENTHAL
$104.61Rotational mass directly impacts acceleration and handling—the Renthal Red 55T sprocket cuts weight by 66% compared to steel while maintaining the durability needed for competitive riding and demanding trail conditions. Built from 7075-T6 aluminum and...12110291- SKU:
- 12110291
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- RED
- TOOTH COUNT:
- 55
$104.61 -
Renthal Red 56-Tooth Rear Sprocket for Honda CR80R CR85R CRF150R 189U-420-56GRRD
RENTHAL
$104.61If you're running a Honda CR80R, CR85R, or CRF150R, the factory rear sprocket is likely costing you acceleration and adding unnecessary rotational mass. The Renthal Red 56-Tooth Rear Sprocket cuts weight by 66% compared to steel alternatives, translating...12110292- SKU:
- 12110292
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
- UNITS:
- EACH
- COLOR/FINISH:
- RED
- MATERIAL:
- 7075-T6 ALUMINUM
- TOOTH COUNT:
- 56
- CHAIN SIZE:
- 420
- MOUNTING POSITION:
- REAR
$104.61 -
Renthal Black 50-Tooth Rear Sprocket for Kawasaki KX100 KX80 KX85 191U-420-50GEBK
RENTHAL
$99.82The Renthal 50-Tooth Rear Sprocket delivers the acceleration and reliability your Kawasaki KX demands, whether you're pushing hard on the track or tackling technical terrain. Built from 7075-T6 aluminum alloy, this sprocket maintains its strength while...12110298- SKU:
- 12110298
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- DRIVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 420
- MOUNTING POSITION:
- REAR
$99.82 -
Renthal 51T Rear Sprocket for Kawasaki KX100 KX80 KX85 Black 191U-420-51GEBK
RENTHAL
$99.82If you're running a KX80, KX85, or KX100 in competitive conditions, sprocket weight directly impacts your bike's responsiveness and acceleration off the line. The Renthal 51T rear sprocket cuts rotational mass by 66% compared to steel alternatives while...12110299- SKU:
- 12110299
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
$99.82 -
Renthal Ultralight Rear Sprocket 52T Black 191U-420-52GEBK
RENTHAL
$99.82Shaving weight off your drivetrain while maintaining durability is critical for acceleration and handling—especially in competitive riding where every tenth matters. The Renthal Ultralight 52T sprocket delivers that performance gain through...12110300- SKU:
- 12110300
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- DRIVE
- UNITS:
- EACH
- CHAIN SIZE:
- 420
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 7075-T6 ALUMINUM
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 52
$99.82 -
Renthal 49-Tooth Aluminum Rear Sprocket for Husqvarna Blue 224U-520-49GPBU
RENTHAL
$104.61If you're running a Husqvarna off-road bike in competitive or high-demand riding conditions, sprocket wear directly impacts your acceleration, chain longevity, and overall drivetrain reliability. The Renthal 49-Tooth Aluminum Rear Sprocket delivers the...12111332- SKU:
- 12111332
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- DRIVE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 49
$104.61 -
Renthal 50-Tooth Blue Rear Sprocket for Husqvarna 224U-520-50GPBU
RENTHAL
$104.61A worn or stock sprocket robs your Husqvarna of efficiency and acceleration response. The Renthal 50-Tooth Rear Sprocket delivers measurable performance gains through precision engineering and weight reduction—cutting 66% of rotating mass compared to...12111333- SKU:
- 12111333
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 50
- TYPE:
- DRIVE
- MOUNTING POSITION:
- REAR
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$104.61 -
Renthal 51-Tooth Blue Anodized Rear Sprocket for Husqvarna 224U-520-51GPBU
RENTHAL
$104.61If you're running a Husqvarna in competitive motocross or demanding off-road conditions, sprocket wear directly impacts your power delivery and chain longevity. The Renthal 51-Tooth Rear Sprocket delivers the lightweight durability required for high-RPM...12111334- SKU:
- 12111334
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 7075-T6 ALUMINUM
- CHAIN SIZE:
- 520
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRIVE
$104.61 -
Renthal Rear Sprocket 38T Orange 415 Chain 48041538POR
RENTHAL
$97.95If you're running a KTM off-road machine, sprocket selection directly impacts your acceleration, top speed, and how your bike responds to terrain changes. The Renthal 38T rear sprocket combines lightweight 7075-T6 aluminum construction with self-cleaning...12111201- SKU:
- 12111201
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- TYPE:
- DRIVE
- MATERIAL:
- 7075-T6 ALUMINUM
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- CHAIN SIZE:
- 415
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 38
- UNITS:
- EACH
$97.95 -
Renthal 40-Tooth Rear Sprocket for KTM 50 SX 415 Chain Orange 48041540POR
RENTHAL
$97.95If you're running a KTM 50 SX and want to shave rotating mass without sacrificing durability, the Renthal 40-Tooth Rear Sprocket is the upgrade that delivers. At 66% lighter than steel, this CNC-machined aluminum sprocket improves acceleration and...12111203- SKU:
- 12111203
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TYPE:
- DRIVE
- CHAIN SIZE:
- 415
- MATERIAL:
- 7075-T6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TOOTH COUNT:
- 40
- COLOR/FINISH:
- ORANGE
- UNITS:
- EACH
$97.95
